If you go to the gradebook and select Import XML from the navigation dropdown you get the following error output.
Not used anymore, please fix code!
- line 345 of /lib/formslib.php: call to debugging()
- line 30 of /grade/import/xml/grade_import_form.php: call to moodleform->set_upload_manager()
- line 149 of /lib/formslib.php: call to grade_import_form->definition()
- line 44 of /grade/import/xml/index.php: call to moodleform->moodleform()
moodleform->set_upload_manager() currently does nothing but output the error.